pKas of the conjugate acids of N-heterocyclic carbenes in water
Chemical Communications2010Vol. 47(5), pp. 1559–1561
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Eleanor M. Higgins, Jennifer Sherwood, Anita G. Lindsay, James P. K. Armstrong, Richard S. Massey, Roger W. Alder, AnnMarie C. O’Donoghue
Abstract
pK(a) values of 19.8-28.2 are reported for the conjugate acids of a large series of NHCs in water. The effects of ring size, N-substituent and C(4)-C(5) saturation on pK(a) are discussed.
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